IWizard and derived classes: Code cleanups

There should be no functional changes, just removal of unnecessary
code. This includes:

* Removal of unused QObject *parent = 0 parameters to constructors
* Removal of unnecessary explicits
* Removal of unnecessary virtuals
* Removal of unnecessary constructors/destructors

Some explicits were added though where those were missing.

Change-Id: Iab570349ea950dad0a2d01af17bc6175f70832f1
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/coreplugin/basefilewizard.cpp

@@ -175,17 +175,6 @@ void WizardEventLoop::rejected()
     \sa Core::Internal::WizardEventLoop
 */
 
-
-BaseFileWizard::BaseFileWizard(QObject *parent) :
-    IWizard(parent)
-{
-}
-
-
-BaseFileWizard::~BaseFileWizard()
-{
-}
-
 BaseFileWizard::ExtensionList BaseFileWizard::selectExtensions()
 {
     return ExtensionSystem::PluginManager::getObjects<IFileWizardExtension>();
@@ -532,11 +521,6 @@ QString BaseFileWizard::preferredSuffix(const QString &mimeType)
     Creates the files with the \a name under the \a path.
 */
 
-StandardFileWizard::StandardFileWizard(QObject *parent) :
-    BaseFileWizard(parent)
-{
-}
-
 /*!
     Creates a Utils::FileWizardDialog.
 */